The largest relocation project at Porta Westfalica was the "large tunnel" in the Jakobsberg, later known under the camouflage name Dachs I. The Ambi-Budd company from Berlin-Johannisthal was initially supposed to house a pressing plant for aircraft parts there, before plans were changed in the summer of 1944 to accommodate a refinery belonging to Deurag-Nerag from Hanover-Misburg. The concentration camp prisoners from the Barkhausen satellite camp had to expand the tunnel on the Hausberg side of the Weser to many times its original size. By the end of the war, the facility was around 90% complete.
After the Dachs I project was finalised, the tunnel above this plant was awarded to Philips and its subsidiary Valvo. The production facility, known as Hammerwerke, was expanded from autumn 1944. From February 1945, radio tubes were produced there by female concentration camp prisoners.
In Wittekindsberg, the companies Dr Böhme and Veltrup moved into the so-called Verlagerung Stör II below the Kaiser Wilhelm monument. Forced labourers produced ball bearings and parts for anti-tank weapons there. For the production of the Weserhütte from Bad Oeynhausen, the Kröte relocation in the Weserstollen in Dehme was expanded; the use of the tunnel facility with the camouflage name Silberfisch in Dützen had not yet been finalised at the end of the war. Before the relocation, both tunnels were part of the Porta iron ore mine.
The Elritze I-IV relocation projects planned in Kleinenbremen were not the responsibility of the SS, but of the Todt organisation. The expansion work had to be carried out by Soviet and Polish prisoners of war. None of the relocations in Kleinenbremen were completed.